BAD ENDING 001 — Slave Walker Sonia 7
An ordinary person might have screamed and branded the other a pervert the moment a hand suddenly groped their most private place in such an open setting, with everyone watching. All the more so because it was happening right in the middle of the armored unit hangar, thick with the cold reek of metal and oil, under the piercing stares of countless pilots and mechanics.
The transformed Sonia was different. This was stimulation of an entirely different order from the mechanical sensation of the cold control-core rod that had been churning deep inside her womb until now. She merely dipped her head a little in surprise at the warm, soft touch of Master Peko’s leather-gloved hand, applied directly from the outside.
Her breath caught as the fingers gently parted her slick, wet labia and pressed firmly against her sensitive clitoris. Sonia’s body trembled finely, quivering, but it was not from fear or shame. It was a pure reaction to irresistible pleasure alone. The knowledge that so many eyes were scrutinizing her master’s hand as it explored her most intimate place—and her lower body glistening with love juices in response—washed over her instead as a spine-melting sense of depravity.
The being standing here now was nothing more than a Slave Walker who trusted her master Peko infinitely and obeyed her absolutely: a cute possession waiting lovingly behind her owner for whatever disposal her master saw fit.
“What am I touching right now? Answer me, Sonia.”
At Peko’s gentle yet irresistible command, Sonia’s red lips parted slightly. Breathing hard with pleasure, she whispered the exact answer she had been trained to give.
“Master’s… Slave Walker Unit, Sonia…♡ A Slave Walker Unit who can do nothing without Master… who absolutely obeys Master… Master… if you keep fondling my pussy like that directly… I’ll feel it…”
Sonia’s waist trembled shamefully. With every touch of Peko’s hand it felt as if every nerve in her body stood on end. Just managing to stay upright on her two legs was a miracle. The sweet moans spilling from her lips clearly proved just how rapturously she was accepting the situation.
Seeing that, the armored unit commander could say nothing more. Anyone could see that the blonde girl was Pilot Peko’s exclusive Slave Walker Unit—for Peko alone. The commander shot a look toward the rookie pilots behind him that said something like Sorry, nothing I can do. I tried, okay?, and they hung their heads in disappointment even as they could not tear their eyes from Sonia’s lewd figure, only managing to dribble nosebleeds.
“…Sonia. There’s a bit of dust on my boots. Clean it.”
Perhaps seized by a strange possessiveness without realizing it, Peko pointed to the tip of her own military boots—which already shone with a black luster free of any dust—and gave the order. It was the first, thoroughly private command she was issuing to Sonia, who would become her second exclusive Slave Walker.
“Yes, Master.”
Without the slightest hesitation, Sonia bent at the waist to wipe away the invisible dust on her master’s boots. Just as she was about to crouch demurely at Peko’s feet and reach out her hand, the master of this Slave Walker Unit issued a different command.
“…I’ve changed my mind. Sonia. Instead, explain to these people, one by one, what modifications Sonia will receive here as a Slave Walker from now on. That’s an order.”
“Yes, Master! Thank you for the order…♡ As Slave Walker Sonia, I will explain to everyone what modifications Master will give me…♡”
Like a child who had just received the best present imaginable, Sonia looked up at Peko with a bright smile, still in her bent-over posture. Confirming that her master had nodded, she slowly rose to her feet and cried out in a clear voice, as if making a glorious oath to herself.

“From now on, after the full-body latex coating treatment to improve the Slave Walker’s electrical stimulus reaction speed, the process of engraving Master’s initials remains! Also, after the custom erogenous-zone enhancement tool sizing process for sensitivity development, I am scheduled to sortie immediately on the next mission. Is this acceptable, Master? …Haaah…♡ Thank you…”
Like a shy girl before her master, Sonia deliberately clasped both hands neatly behind her waist and slightly pushed out her lower abdomen. The commander and the cadets could only stare at her with eyes mixed with admiration and jealousy, wondering just where she had found this blonde girl who possessed both a gentle personality and perfect Walker Unit aptitude.
Peko thrust her leather finger-gloved fingers straight into Sonia’s mouth. Pulling on her soft tongue, she walked forward as if simply going about her own business.
“First, ‘this.’ It’s fine if we go after putting on the Walker Unit equipment first, right?”
“Uh… uh. Yeah… In the meantime, I’ll go check on Milli a bit…”
The armored unit commander answered with a dazed look. At the bizarre sight of Peko and the Slave Walker Unit behind her—shy and in heat with her tongue held—the rookie chick Walker pilots could not hide their regret as they saluted the departing Peko.
(…Even if we don’t have combat experience, this is… This is unfair… If I just get one big achievement, I… wouldn’t be any different from that Senior Peko…!)
Though the times they had joined the unit varied, the lack of field experience was the same for all of them. One of those rookie chick pilots began to harbor a sinister thought, but she could not stop the footsteps of the lewd, busty Slave Walker Unit and her pilot Peko as they headed toward the management room where the Walker Unit maintenance facilities were located.
“Here we are. Close, right? From Sonia’s perspective, how do you ‘think’ of this place?”
“It’s clean… and from my view, it also looks close to a training school for receiving education. Master.”
The place they arrived at following behind Peko looked like a large goods-management factory. Instead of the container boxes typical of factories, robot arms equipped with spray nozzles of the sort used for painting cars lined the ceiling in rows. Paint marks were scattered across the floor as if something had just been painted moments ago, but on closer inspection, rather than thinly dried paint, it was a rubbery substance with a jelly-like thick consistency.
“Is that so? A good answer. And the one I expected, too. As expected, Sonia really seems perfect as a Slave Walker Unit. Don’t you think so too, Sonia?”
“Heuk… Hnn… Thank you… Master…♡”
As if rewarding the Slave Walker Unit who had given exactly the answer she expected, Peko pressed firmly on Sonia’s lower abdomen and whispered words of praise into her ear. A unit that merely reacted mechanically to simple instructions was nothing more than a common part, a biological component inferior even to artificial intelligence. Peko felt deep satisfaction at the fact that Sonia’s intelligence and ego remained intact.
“Then I’ll explain what we’re going to do from now on. Don’t forget, and listen carefully, Sonia. What kind of being is Sonia right now?”
“Yes, Master. Slave Walker Sonia is Master Peko’s Slave Walker Unit, and has been educated in the identity of a Slave Walker Unit. A Slave Unit who can do nothing without Master Peko. That is me.”
Ordinary units had no choice but to undergo procedures that suppressed their ego due to the instinctive fear and resistance experienced during the modification process. The more that happened, the more sensitivity declined and performance dropped in a vicious cycle. Peko deliberately asked Sonia for her impressions and induced long answers, carefully checking that there was no damage to her personality.
The results were highly successful. Without any sign of damage to her ego or shock, Sonia retained the knowledge and personality from her days as a hero of Sky City exactly as they were. It was simply that the absolute identity of Slave Walker Unit had been perfectly overlaid on top of it. A combat Walker Unit that, because it possessed an ego, could make autonomous judgments in emergencies while still absolutely obeying its pilot. A top-grade product with every additional option attached and no penalties whatsoever.
“First of all, thank you, Sonia. A smart Walker Unit like Sonia would know this is the base without me saying so. You know we pulled out even though the field situation isn’t over yet, right? Can you answer?”
“Yes, Master. I understand that I volunteered as a Slave Walker Unit in place of Milli-nim, the Slave Walker Unit damaged in the drone terrorism of unknown origin, and left the field.”
If her ego had been suppressed, the answer would have ended in a short form like “Yes, Master. I left the field.” Sonia, while maintaining her own personality, explained coherently without missing the important parts.
“Exact. There are probably a lot more annoying things than the drones we shot down earlier. Not right now, but we have to go back to the field. You’re doing well even now, but we should prepare thoroughly, right?”
“Yes. Slave Walker Unit Sonia thinks preparation is necessary. Master. What should I do?”
“Of course, from now on Sonia is also my exclusive Slave Walker Unit, so I plan to put all the necessary equipment on you. From this very moment, have Sonia wear a Walker Unit exclusive suit just like Milli.”
“Milli-nim… like Master Peko’s Slave Walker Unit… the same outfit… It’s only natural. Since I am Master Peko’s Slave Walker Unit Sonia… of course I should prepare…”
Hearing the name “Milli,” Sonia recognized that she would be replacing that position, and that she would become her master’s new possession, and smiled faintly. Peko’s voice was cold and firm like steel. Peko’s gaze was already treating Sonia not as a person with a personality, but as her own possession and tool.
Before Peko’s gaze, Sonia’s faint sense of resistance crumbled like a sandcastle. Peko shook the datapad in her hand before Sonia’s eyes and ordered.
“If you understand, stand over there. Slave Walker. If you can be of even a little help to Master, you can willingly sign here, right?”
The word “Master” that came from Peko’s mouth stimulated the mind-control crystal embedded in Sonia’s brain and called forth a sweet impulse of submission. Sonia’s blue eyes briefly lost focus and grew hazy. Inside her head, Peko’s voice echoed, engraving the reason for her existence.
“Help to Master… to Master… because I am a Slave Walker…”
Sonia’s lips, stammering out the words, were slightly parted. Her reason was paralyzed, and only the instinct that she must serve her master dominated her entire body. Sonia nodded as if entranced. There was no hesitation. Only joy and anticipation filled her chest.
“Yes! Master! If I can be of help…!”
Peko smiled with satisfaction and opened a nearby storage cabinet. Inside, various documents and equipment necessary for operating Slave Walker Units were neatly organized. From among them, Peko pulled out a datapad labeled “Sky City Combat Walker Unit Contract” and held it out to Sonia.
This contract differed in form from the human-rights renunciation affidavits applied to ordinary slaves or criminals. It took the form of an employment contract based on the rights of a free citizen. A unit without human rights could not express its own will when a pilot was assigned, but a unit that chose its master of its own “free will” was eternally bound by that choice. Peko wanted Sonia to fasten the shackles of submission upon herself.
Sonia accepted the datapad with trembling hands. She brought her finger to the signature field next to her own name that had appeared on the screen. Without hesitation, she left her name as a digital signature. In that moment, the contract was established.
“Here it is, Master. With this, I’ve officially become Sky City’s Slave Walker Unit, Sonia! Please take care of me from now on, Master! As Slave Walker Unit Sonia, I’ll entrust everything of mine to Master!”
A declaration of submission that the self of mere minutes ago could never have imagined flowed smoothly from Sonia’s mouth. Sonia herself was a little surprised, but even that surprise transformed into sweet pleasure. The mind-control crystal that had seeped deep into her brain and her innately weak mental resistance had erased everything other than the new identity of “Slave Walker Unit.” Even the name “Sonia” now meant nothing more than a single symbol subordinate to her master.
Peko lightly stroked Sonia’s head and issued the next instruction. At Peko’s touch, Sonia’s body trembled finely with joy.
“Good. Then go into the Slave Unit suit processor. The machine will handle the processing on its own, so just stand still without moving. Answer if you understand?”
“Yes, Master.”
In the place Peko pointed to with her finger, there was a space with a circular guideline drawn on the floor. When Sonia stood in its center, a huge transparent dome-shaped plastic cylinder began to slowly descend from the ceiling without a sound. The black paint marks faintly scattered on the floor told that many units before her had undergone the same process as herself in this place. The cylinder perfectly enveloped Sonia’s body and isolated her from the outside.